[Cthulhu_]

For me it's low stress / passive situations, like listening to presentations or sitting in a meeting where I'm just observing. And that's with good sleep etc.

[yoz-y]

Any kind of one sided meeting puts me to sleep. So I either don’t go, leave or work on my computer if it is not relevant. Luckily my company encourages not going to meetings where you feel you don’t have anything useful to add.

Unfortunately I haven’t even been able to make it through one phd presentation of my friends.